Leaf has slight change in color

If it's just one leaf, I would not worry. This is a normal characteristic of nitrogen deficiency, but I think it's more likely that a water droplet magnified your light and it burned the tip. It could also be a nutrient burn. Your leaves look dark green, which can be a sign of too much nitrogen. Confusing, I know. Start with making sure you dont get your leaves wet (at least during daytime hours) and making sure your pH is good. Otherwise, dont do anything else unless it begins to spread. Good luck my friend!

She's running hot.. it's burn but nothing to really worry about if only effected one leaf and just the tip